J/MNRAS/453/4185 NGC 2355 BVI photometry (Donati+, 2015)
Photometric and spectroscopic study of the intermediate-age open cluster
NGC 2355.
Donati P., Bragaglia A., Carretta E., D'Orazi V., Tosi M., Cusano F.,
Carini R.
<Mon. Not. R. Astron. Soc., 453, 4185-4202 (2015)>
=2015MNRAS.453.4185D 2015MNRAS.453.4185D (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, open ; Photometry, UBVRI
Keywords: Hertzsprung-Russell and colour-magnitude diagrams - Galaxy: disc -
open clusters and associations: general -
open clusters and associations: individual: NGC 2355
Abstract:
In this paper we analyse the evolutionary status and properties of the
old open cluster NGC 2355, located in the Galactic anticentre
direction, as a part of the long-term programme Bologna Open Clusters
Chemical Evolution. NGC 2355 was observed with the Large Binocular
Camera at the Large Binocular Telescope using the Bessel B, V, and Ic
filters. The cluster parameters have been obtained using the synthetic
colour-magnitude diagram method, as done in other papers of this
series. Additional spectroscopic observations with the Fibre-fed
Echelle Spectrograph at the Nordic Optical Telescope of three giant
stars were used to determine the chemical properties of the cluster.
Our analysis shows that NGC 2355 has metallicity slightly less than
solar, with [Fe/H]=-0.06dex, age between 0.8 and 1Gyr, reddening
E(B-V) in the range 0.14-0.19mag, and distance modulus (m-M)0 of about
11mag. We also investigate the abundances of O, Na, Al, α,
iron-peak, and neutron capture elements, showing that NGC 2355 falls
within the abundance distribution of similar clusters (same age and
metallicity). The Galactocentric distance of NGC 2355 places it at the
border between two regimes of metallicity distribution; this makes it
an important cluster for the study of the chemical properties and
evolution of the disc.
Description:
The cluster was observed as part of the BOCCE programme using Large
Binocular Camera (LBC) mounted at LBT on Mount Graham (AZ, USA).
All data were acquired during one night (2012 February 22), with
seeing of about 1.6 arcsec and using the Johnson-Cousins filters (B
on LBC-Blue and V, I on LBC-Red).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
photom.dat 149 4791 BVI photometric catalogue
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See also:
J/PASJ/56/295 : BVIc photometry of old open clusters (Hasegawa+, 2004)
J/A+A/429/607 : BV photometry of Berkeley 36, 73 and 34 (Ortolani+, 2005)
J/A+A/464/573 : VI photometry of 5 open clusters (Carraro+, 2007)
J/MNRAS/424/1132 : BVI photometry of Be 27, Be 24 and Be 36 (Donati+, 2012)
Byte-by-byte Description of file: photom.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- ID ID number
9- 11 A3 --- Chip Chip
14- 22 F9.4 pix Xpos X position
24- 32 F9.4 pix Ypos Y position
36- 46 F11.7 deg RAdeg Right ascension (J2000)
51- 60 F10.7 deg DEdeg Declination (J2000)
65- 72 F8.5 mag Mod Distance modulus, (m-M)0
76- 81 F6.3 mag Bmag ?=99.999 Bessel B magnitude
83- 88 F6.3 mag e_Bmag ?=99.999 rms uncertainty on Bmag
91- 96 F6.3 mag Vmag ?=99.999 Bessel V magnitude calibrated
using (B-V) color index
98-103 F6.3 mag e_Vmag ?=99.999 rms uncertainty on Vmag
105-110 F6.3 mag V2mag ?=99.999 Bessel V2 magnitude calibrated
using (V-I) color index
112-117 F6.3 mag e_V2mag ?=99.999 rms uncertainty on V2mag
120-125 F6.3 mag Imag ?=99.999 Bessel Ic magnitude
127-132 F6.3 mag e_Imag ?=99.999 rms uncertainty on Imag
136-141 F6.3 --- chi2 Chi square of the PSF photometry
144-149 F6.3 --- sh Sharpness index of the PSF photometry
(0=star; <0=cosmic rays; >0=extended)
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 20-Jun-2016